As he strolls across the lawn, it is hard to believe Jasper the dachshund was unable to use his hind legs just two years ago.

Paralysed in an accident, he needed years of physiotherapy and a special trolley to get around.

But scientists conducting a study at Cambridge University have helped him walk again with a pioneering treatment that offers hope for human patients with spinal injuries.

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Back on his feet: Jasper, the ten-year-old dachshund as he is now. Just two years ago, he could not use his hind legs

Breakthrough: Pet dogs left paralysed by spine
damage have been able to walk again after pioneering cell
treatment. This image shows Jasper the dog at the start of a trial with his rear legs limp and unusable

Better: After six months of treatment, Jasper's legs are seen walking almost normally. The treatment involves injecting cells from the dogs' nose into the injured part of their back

Injecting cells from the dog’s nose
into the injured part of his spine helped repair the damage. After the
treatment, Jasper was able to move his previously paralysed hind legs
and co-ordinate movement with his front limbs. The ten-year-old dog is
now ‘whizzing around’ unassisted and can also swim.

Early trials involving humans have
taken place, and Professor Robin Franklin, co-author of the study from
the Wellcome Trust-MRC Cambridge Stem Cell Institute, said: ‘Our
findings are extremely exciting because they show for the first time
that transplanting these types of cell into a severely damaged spinal
cord can bring about significant improvement.

‘We’re confident the technique might
be able to restore at least a small amount of movement in human patients
with spinal cord injuries, but that’s a long way from saying they might
be able to regain all lost function.

‘It’s more likely that this procedure
might one day be used as part of a combination of treatments, alongside
drug and physical therapies, for example.’

In the study, published in the journal
Brain, scientists looked at 34 pet dogs with severe spinal injuries
that left them unable to use their back legs to walk.

Those injected with olfactory
ensheathing cells (OECs) from their noses showed a considerable
improvement, moving previously paralysed limbs. Some also regained lost
bowel and bladder control.

A second group treated with a placebo showed
no benefits.

Previous research suggests OECs, which
maintain the communication pathway between the nose and the brain, can
help form a bridge between damaged and undamaged parts of the spine by
regenerating nerve fibres.

The latest study was the first conducted on
animals at least 12 months after their spines were damaged in accidents.
Scientists say this more closely resembles a scenario that would
involve human patients.

Jasper suffered a slipped disk that
left his hind legs paralysed in 2008. His owner, May Hay, said: ‘Before
the trial, he was unable to walk at all. When we took him out we used a
sling for his back legs so he could exercise the front ones. It was
heartbreaking.

‘But now we can’t stop him whizzing
around the house and he can even keep up with the two other dogs we own.
It’s utterly magic.’

Smiling again: Jasper is shown six months after the treatment walking on a treadmill without any aid. His owner says she now 'can't stop him whizzing round the house' and that he is able to keep up with other dogs

Professor Geoffrey Raisman, chairman
of neural regeneration at University College London, said: ‘This is not a
cure for spinal cord injury in humans. But this is the most encouraging
advance for some years and a significant step on the road towards it.

‘This shows convincingly that the beneficial effects previously reported in rodents can be produced in other species.

‘That is encouraging for application in human injuries.’

HOW THE STUDY WAS CONDUCTED

Scientists studied 34 pet dogs that had all suffered spinal cord injuries as a result of accidents and back problems. None were injured deliberately for the sake of research.

A year or more after their injuries, the animals were unable to use their back legs to walk and incapable of feeling pain in their hindquarters.

Many of the dogs were dachshunds, which are especially prone to this type of injury. Unlike humans, dogs can suffer serious damage to their spinal cord just by having a slipped disc.

One group of dogs had OECs taken from the lining of their own noses and injected into the injury site. Another was only injected with the liquid in which the cells were suspended.

The trial was 'double blind', meaning that until the study ended neither the researchers nor the dog owners knew which animals had received the active treatment.

Dogs were tested for neurological function at one month intervals and had their walking ability assessed on a treadmill.

Significant improvement was seen in the dogs injected with OECs, but not those receiving the placebo treatment, according to the findings reported in the journal Brain.

OEC-treated dogs moved previously paralysed hind limbs and co-ordinated the movement with that of their front legs.

However, the researchers found that new nerve connections were only generated over short distances within the spinal cord.